Residual stress in low temperature carburised layer of austenitic stainless steel

被引：7

作者：

Rong, D. S. ^{[1
]}

Jiang, Y. ^{[1
]}

Gong, J. M. ^{[1
]}

机构：

[1] Nanjing Tech Univ, Sch Mech & Power Engn, Nanjing 211816, Jiangsu, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2017年 / 33卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Low temperature carburisation; Austenitic stainless steel; Residual stress; Nanoindentation; Finite element simulation; X-RAY-DIFFRACTION; MECHANICAL-PROPERTIES; SHARP INDENTATION; NANOINDENTATION RESPONSE; CARBON SUPERSATURATION; SENSING INDENTATION; REDUCED MODULUS; STRAIN FIELDS; THIN-FILMS; PILE-UP;

D O I：

10.1080/02670836.2016.1190537

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure, elements concentration and residual stress of a low temperature carburised layer on 316L austenitic stainless steel were investigated by optical microscopy, electron probe microanalysis, nanoindentation and X-ray diffraction (XRD). The results show that surface carbon concentration and nanohardness increase significantly after low temperature carburisation in the mixture gas of 30vol.-% CO-30vol.-% H-2-40vol.-%N-2 at 743K for 20h, while Young's modulus keeps unchanged. A finite element model was proposed to simulate the nanoindentation of unstressed carburised layer based on the results of nanoindentation experiments. Combined with the experimental and simulation results, the residual stress was calculated based on Suresh model, which agrees well with the corrected data by XRD method. The surface displacement around indenter was discussed.

引用

页码：277 / 284

页数：8

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